Hybrid drive train and electrical machine

Abstract

The present invention relates to a hybrid drive train for a motor vehicle, comprising a clutch arrangement having a first rotatable clutch part and a second rotatable clutch part, which clutch parts can be separated from one another and which can be connected to one another, and comprising an electrical machine which is arranged concentrically with respect to the first clutch part and has a rotor, wherein the rotor is connected with the first clutch part and comprises a plurality of magnetic flux influencing portions, the magnetic flux influencing portions being arranged distributed over the circumference of the rotor with a predetermined rotor pitch. Here, the first clutch part comprises a shaft toothing that is adapted to the rotor pitch.

1. Hybrid drive train for a motor vehicle, comprising a clutch arrangement having a first rotatable clutch part and a second rotatable clutch part which clutch parts can be separated from one another and can be connected to one another, and comprising an electrical machine which is arranged concentrically with respect to the first clutch part and has a rotor wherein the rotor is connected with the first clutch part and comprises a plurality of magnetic flux influencing portions, the magnetic flux influencing portions being arranged distributed over the circumference of the rotor with a predetermined rotor pitch,
 wherein 
 the first clutch part comprises a shaft toothing that is adapted to the rotor pitch. 
 
     
     
       2. Hybrid drive train according to  claim 1 , wherein the ratio of a toothing pitch of the shaft toothing to the rotor pitch is an integer number. 
     
     
       3. Hybrid drive train according to  claim 2 , wherein the ratio of the toothing pitch to the rotor pitch is 1. 
     
     
       4. Hybrid drive train according to  claim 1 , wherein the ratio of a circumferential length of shaft toothing portions that are aligned in a circumferential direction with a respective magnetic flux influencing portion, to a circumferential length of shaft toothing portions that are arranged in the circumferential direction between adjacent magnetic flux influencing portions, is chosen such that a magnetic flux from one magnetic flux influencing portion to an adjacent magnetic flux influencing portion is guided essentially past tooth flanks of the shaft toothing. 
     
     
       5. Hybrid drive train according to  claim 1 , wherein the ratio of a circumferential length of shaft toothing portions that are aligned in a circumferential direction with a magnetic flux influencing portion, to a circumferential length of shaft toothing portions that are arranged in the circumferential direction between respective adjacent magnetic flux influencing portions, is in the range from 45:55 to 20:80. 
     
     
       6. Hybrid drive train according to  claim 1 , wherein the magnetic flux influencing portions and the shaft toothing are arranged with respect to each other in circumferential direction such that a magnetic flux from one magnetic flux influencing portion to an adjacent magnetic flux influencing portion is guided essentially exclusively through a rotor body of the rotor. 
     
     
       7. Hybrid drive train according to  claim 1 , wherein the magnetic flux influencing portions and the shaft toothing are arranged with respect to each other in the circumferential direction such that a magnetic flux from a magnetic flux influencing portion to an adjacent magnetic flux influencing portion is guided at least partially through a circumferential portion of the first clutch part, which is arranged between the magnetic flux influencing portions. 
     
     
       8. Hybrid drive train according to  claim 7 , wherein the circumferential portion of the first clutch part, which guides the magnetic flux, is a tooth of the shaft toothing. 
     
     
       9. Hybrid drive train according to  claim 1 , wherein the first clutch part comprises at least a channel that extends in an axial direction and via which a fluid can flow against at least a portion of the electrical machine. 
     
     
       10. Hybrid drive train according to  claim 1 , wherein the first clutch part comprises at least one opening which is continuous in the radial direction and via which a fluid can flow against at least a portion of the electrical machine. 
     
     
       11. Hybrid drive train for a motor vehicle, comprising a clutch arrangement having a first rotatable clutch part and a second rotatable clutch part, which clutch parts can be separated from one another and can be connected to one another, and comprising an electrical machine which is arranged concentrically with respect to the first clutch part and has a rotor wherein the rotor is connected with the first clutch part and comprises a plurality of magnetic flux influencing portions, the magnetic flux influencing portions being arranged distributed over the circumference of the rotor with a predetermined rotor pitch, wherein the first clutch part comprises at least a channel that extends in an axial direction and via which a fluid can flow against at least a portion of the electrical machine. 
     
     
       12. Hybrid drive train for a motor vehicle, comprising a clutch arrangement having a first rotatable clutch part and a second rotatable clutch part, which clutch parts can be separated from one another and can be connected to one another, and comprising an electrical machine which is arranged concentrically with respect to the first clutch part and has a rotor wherein the rotor is connected with the first clutch part and comprises a plurality of magnetic flux influencing portions, the magnetic flux influencing portions being arranged distributed over the circumference of the rotor with a predetermined rotor pitch, wherein the first clutch part comprises at least one opening which is continuous in the radial direction and via which a fluid can flow against at least a portion of the electrical machine. 
     
     
       13. Hybrid drive train according to  claim 12 , wherein the first clutch part comprises at least a channel that extends in an axial direction and via which a fluid can flow against at least a portion of the electrical machine, and wherein the first clutch part comprises at least one opening which is continuous in the radial direction and via which a fluid can flow against at least a portion of the electrical machine and wherein the opening is connected to the channel. 
     
     
       14. Hybrid drive train according to  claim 10 , wherein the first clutch part protrudes with respect to the rotor in the axial direction, at least on one side thereof, wherein the opening, via which fluid can flow against stator of the electrical machine, is arranged in the protruding portion. 
     
     
       15. Hybrid drive train according to  claim 1 , wherein the clutch is a multi-disk clutch, wherein the first clutch part comprises an outer disk carrier of the multi-disk clutch, wherein the outer disk carrier is connected in a circumferential direction to the rotor via a shaft toothing. 
     
     
       16. Electrical machine having an outer stator and an inner rotor, wherein the rotor is coupled in a circumferential direction to a rotor shaft, wherein the stator has a larger width in an axial direction than the rotor, wherein the rotor shaft protrudes at least on one side in the axial direction with respect to the rotor, wherein at least one radially continuous opening is formed in the protruding portion of the rotor shaft, wherein fluid can flow via the opening against the stator.